1.Divine's punishments, though slow, are always sure.

天网恢恢，疏而不漏。

2.An act is not a crime unless the law says it is one.

法无明文规定者不为罪。

3. The law does not concern itself about family trifles.

法律难断家务事。

4. This law has become a dead letter.

此法已成为一纸空文。